python for 循环

#for遍历列表/元组

a = [1,2,3,4,5,6,7]

b = (1,2,3,4,5,6,7)

for x in a:

    print(x)

for x in b:

    print(x)

# 遍历字符串
c = "python"
for x in c:
print(x)

# 遍历字典,取键值对，取键，取值，items(),  keys(),  values()
# students = {"姓名":"张三","学号":"001","年龄":"18",}
# for item in students:
#     print(item) # 只能取键值
# students = {"姓名":"张三","学号":"001","年龄":"18",}
# for item in students.items():
#     print(item) #取键值对，打印结果带引号
# students = {"姓名":"张三","学号":"001","年龄":"18",}
# for key,value in students.items():
#     print(key, value) # 打印结果不带引号
# students = {"姓名":"张三","学号":"001","年龄":"18",}
# for key in students.keys():
#     print(key) # 取key值
# students = {"姓名":"张三","学号":"001","年龄":"18",}
# for value in students.values():
#     print(value) # 取values
# # range
# a = range(1,10,1)
# print(a)
# b = list(a)
# print(b)
# for i in range(1,10,2):
#     print(i)
# 求和1到100
# total = 0
# for i in range(1,101):
#     total += i #此句如果不注释掉，运行结果是一长串，100行
#     print(total)
#
tt = sum(range(1,101))
print(tt)